If those don't drive you nuts - you have the patience of Job.
Trim Charts -wer originated by those trying to arrive at the "perfect model" which literally flew it's self thru various attitudes .
Once this is all perfect - try flying it in a wind -
you will likely find that you MUST fly the model constantly as the perfectly nuetral model has directional stability problems.
But go thru the exercize - it is a good learning experience
when done - find the setup comfortable for you
typically a slight forward balance to encourage directional stability will suit most setups.